Resolve clang-format drift in tracked source and generated icon header

[Copilot]

The clang-format Actions job was failing because the repository no longer matched the formatter output expected by CI. This change brings the tracked files back into alignment with the LLVM 21 formatting rules used in the workflow.

• CI failure cause

  • The workflow install step was healthy; the failure came from ./bin/clang-format-fix rewriting tracked files and leaving a non-empty diff.

• Formatting updates

  • Applied clang-format output to the affected C++ sources and tests:
    • lib/Epub/Epub/ReferencePageNavigation.h
    • src/SettingsList.h
    • src/activities/boot_sleep/SleepActivity.cpp
    • src/activities/reader/EpubReaderActivity.cpp
    • test/stable_page_navigation/StablePageNavigationTest.cpp
  • Changes are limited to line wrapping, indentation, and expression layout.

• Generated asset consistency

  • Regenerated src/components/icons/keyboardIcons.h from src/components/icons/keyboardIcons.manifest so the checked-in generated header matches current formatter output instead of editing generated content by hand.

PATH="/usr/lib/llvm-21/bin:$PATH" ./bin/clang-format-fix
git diff --exit-code